摘要
为评价喀什噶尔河流域绿洲生态环境质量与演变过程,基于Landsat遥感影像数据,运用NDVI与像元二分模型等方法分析1993~2019年喀什噶尔河流域绿洲植被覆盖时空演化。结果表明,喀什噶尔河流域绿洲植被分布总体上以克孜河与盖孜河为轴线,呈现从高到低向外分布,极高与高覆盖度集中于流域两岸大面积片状分布,中与低覆盖度集中于极高与高覆盖度外围、戈壁滩相遇及山脉脚下片状分布特征;1993~2019年喀什噶尔河流域绿洲植被覆盖度均呈增加趋势,净增加2036.6km^(2),增长率为35.43%;喀什噶尔河流域绿洲植被覆盖存在时段性和区域性差异;气候变暖对绿洲植被覆盖度空间变化有一定影响,其中气温上升率为0.047℃/a,降雨增率为1.887mm/a;绿洲土地利用类型变化明显,2005~2018年变化速度均比1990~2005年的变化速度快,其中耕地、林地、城镇用地与水域面积分别增加1766、156、338、47km^(2),草地和未利用地面积分别减少1362、945km^(2)。
In order to evaluate the quality and evolution of the ecological environment of the oasis in the Kashgar River Basin,based on Landsat remote sensing image data,NDVI and pixel binary models were used to analyze the spatio-temporal evolution of vegetation coverage in the Kashgar River Basin from 1993 to 2019.The results show that the distribution of vegetation in the oasis takes the Kezihe River and the Gaizihe River as the axis on the whole,showing the characteristics of distribution from high to low.Very high and high coverage periphery,the Gobi desert meets,and the flaky distribution characteristics at the foot of mountains;From 1993 to 2019,the vegetation coverage of the oasis in the Kashgar River Basin showed an increasing trend,with a net increase of 2036.6 km^(2) and a growth rate of 35.43%;Oasis vegetation coverage in the Kashgar River Basin has temporal and regional differences;Climate warming has a certain impact on the spatial variation of oasis vegetation coverage,in which the temperature rise rate is 0.047℃/a,and the rainfall increase rate is 1.887 mm/a;The land use types of oasis have changed significantly,and the change rate in 2005-2018 is faster than that in 1990-2005.Among them,the area of cultivated land,woodland,urban land and water area increased by 1766,156,338 and 47 km^(2) respectively,and the area of grassland and unused land reduced by 1362 and 945 km^(2) respectively.
作者
麦麦提吐逊·麦麦提
马合木江·艾合买提
陶洪飞
姜有为
李巧
Mamattursun·Mamat;Mahemut·Ahmat;TAO Hong-fei;JIANG You-wei;LI Qiao(College of Water Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《水电能源科学》
北大核心
2021年第7期28-32,共5页
Water Resources and Power
基金
2020新疆维吾尔自治区创新环境建设专项-自然科学基金计划青年科学基金项目(2020D01B31)。
